ARM: sun4i: dt: Enable dram gate 5 (tve0 clock) for simplefb TV output

Seems like dram_gate 5 was forgotten when DRAM gate driver was added.

Enable it.

Cc: stable@vger.kernel.org
Fixes: 82f8582f

 (ARM: dts: sun4i: Add DRAM gates)
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>